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03 Feb 2010  
Microsoft MVP

Win 7 Ultimate x64

Quote   Quote: Originally Posted by fseal View Post
Well since the center channel and subwoofer frequency ranges do not cross at all (Each set of amps/speakers would filter out the others freq range) It's apparently being used for both. So if you have a center channel AND subwoofer output you need to put a Y cable into the orange jack and run one to the center and the other to sub.

It LOOKS like the way the sound is setup you don;t get any sub if you don;t have a center channel but sometimes the manuals can be a bit terse and not fully explaing things. Give 2.1 a try, it'll either work or it wont. But given that 4 ch has no sub listed there may not actually be any 2.1 either. I'd try it anyway, you never know.
You sure about any of that? This is from the manual for the back of the speakers I linked to,

Slightly confused about Motherboard sound options-x540.jpg

and yes the sub and center both go off the same cable. And a 2.1 set will be similar in that there is only one cable connected between the speakers and the sound card, with the fronts connecting to the sub.

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